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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.cache.test;
import junit.framework.TestCase;
import com.yahoo.search.result.Hit;
import com.yahoo.search.Query;
import com.yahoo.search.Result;
import com.yahoo.statistics.Statistics;
import com.yahoo.prelude.cache.Cache;
import com.yahoo.prelude.cache.QueryCacheKey;
@SuppressWarnings({"rawtypes", "unchecked"})
public class CacheTestCase extends TestCase {
private Result getSomeResult(Query q, String id) {
Result r = new Result(q);
r.hits().add(new Hit(id, 10));
return r;
}
public void testBasicGet() {
Cache<QueryCacheKey, Result> cache=new Cache<>(100*1024,3600, 100000, Statistics.nullImplementation);
Query q = new Query("/std_xmls_a00?hits=5&offset=5&query=flowers+shop&tracelevel=4&objid=ffffffffffffffff");
Query q2 = new Query("/std_xmls_a00?hits=5&offset=5&query=flowers+shop&tracelevel=4&objid=ffffffffffffffff");
QueryCacheKey qk = new QueryCacheKey(q);
QueryCacheKey qk2 = new QueryCacheKey(q2);
Result r = getSomeResult(q, "foo");
Result r2 = getSomeResult(q, "bar");
assertNull(cache.get(qk));
cache.put(qk, r);
assertNotNull(cache.get(qk));
assertEquals(cache.get(qk), r);
cache.put(qk2, r);
assertEquals(cache.get(qk2), r);
cache.put(qk, r2);
assertEquals(cache.get(qk), r2);
}
public void testPutTooLarge() {
byte[] tenKB = new byte[10*1024];
for (int i = 0 ; i <10*1024 ; i++) {
tenKB[i]=127;
}
byte[] sevenKB = new byte[7*1024];
for (int i = 0 ; i <7*1024 ; i++) {
sevenKB[i]=127;
}
Cache cache=new Cache(9*1024,3600, 100*1024, Statistics.nullImplementation); // 9 KB
assertFalse(cache.put("foo", tenKB));
assertTrue(cache.put("foo", sevenKB));
assertEquals(cache.get("foo"), sevenKB);
}
public void testInvalidate() {
byte[] tenKB = new byte[10*1024];
for (int i = 0 ; i <10*1024 ; i++) {
tenKB[i]=127;
}
byte[] sevenKB = new byte[7*1024];
for (int i = 0 ; i <7*1024 ; i++) {
sevenKB[i]=127;
}
Cache cache=new Cache(11*1024,3600, 100*1024, Statistics.nullImplementation); // 11 KB
assertTrue(cache.put("foo", sevenKB));
assertTrue(cache.put("bar", tenKB));
assertNull(cache.get("foo"));
assertEquals(cache.get("bar"), tenKB);
}
public void testInvalidateLRU() {
Cache cache=new Cache(10*1024,3600, 100*1024, Statistics.nullImplementation); // 10 MB
byte[] fiveKB = new byte[5*1024];
for (int i = 0 ; i <5*1024 ; i++) {
fiveKB[i]=127;
}
byte[] twoKB = new byte[2*1024];
for (int i = 0 ; i <2*1024 ; i++) {
twoKB[i]=127;
}
byte[] fourKB = new byte[4*1024];
for (int i = 0 ; i <4*1024 ; i++) {
fourKB[i]=127;
}
assertTrue(cache.put("five", fiveKB));
assertTrue(cache.put("two", twoKB));
Object dummy = cache.get("five"); // Makes two LRU
assertEquals(dummy, fiveKB);
assertTrue(cache.put("four", fourKB));
assertNull(cache.get("two"));
assertEquals(cache.get("five"), fiveKB);
assertEquals(cache.get("four"), fourKB);
// Same, without the access, just to check
cache=new Cache(10*1024,3600, 100*1024, Statistics.nullImplementation); // 10 KB
assertTrue(cache.put("five", fiveKB));
assertTrue(cache.put("two", twoKB));
assertTrue(cache.put("four", fourKB));
assertEquals(cache.get("two"), twoKB);
assertNull(cache.get("five"));
assertEquals(cache.get("four"), fourKB);
}
public void testPutSameKey() {
Cache cache=new Cache(10*1024,3600, 100*1024, Statistics.nullImplementation); // 10 MB
byte[] fiveKB = new byte[5*1024];
for (int i = 0 ; i <5*1024 ; i++) {
fiveKB[i]=127;
}
byte[] twoKB = new byte[2*1024];
for (int i = 0 ; i <2*1024 ; i++) {
twoKB[i]=127;
}
byte[] fourKB = new byte[4*1024];
for (int i = 0 ; i <4*1024 ; i++) {
fourKB[i]=127;
}
assertTrue(cache.put("five", fiveKB));
assertTrue(cache.put("two", twoKB));
assertEquals(cache.get("two"), twoKB);
assertEquals(cache.get("five"), fiveKB);
assertTrue(cache.put("five", twoKB));
assertEquals(cache.get("five"), twoKB);
assertEquals(cache.get("two"), twoKB);
}
public void testExpire() throws InterruptedException {
Cache cache=new Cache(10*1024,50, 10000, Statistics.nullImplementation); // 10 KB, 50ms expire
boolean success = false;
for (int tries = 0; tries < 10; tries++) {
long before = System.currentTimeMillis();
cache.put("foo", "bar");
cache.put("hey", "ho");
Object got1 = cache.get("foo");
Object got2 = cache.get("hey");
long after = System.currentTimeMillis();
if (after - before < 50) {
assertEquals(got1, "bar");
assertEquals(got2, "ho");
success = true;
break;
}
}
assertTrue(success);
Thread.sleep(100);
assertNull(cache.get("foo"));
assertNull(cache.get("hey"));
}
public void testInsertSame() {
Cache cache=new Cache(100*1024,500, 100000, Statistics.nullImplementation); // 100 KB, .5 sec expire
Query q = new Query("/std_xmls_a00?hits=5&offset=5&query=flowers+shop&tracelevel=4&objid=ffffffffffffffff");
Result r = getSomeResult(q, "foo");
QueryCacheKey k = new QueryCacheKey(q);
cache.put(k, r);
assertEquals(1, cache.size());
q = new Query("/std_xmls_a00?hits=5&offset=5&query=flowers+shop&tracelevel=4&objid=ffffffffffffffff");
k = new QueryCacheKey(q);
cache.put(k, r);
assertEquals(1, cache.size());
}
public void testMaxSize() {
Cache cache=new Cache(20*1024,500, 3*1024, Statistics.nullImplementation);
byte[] fourKB = new byte[4*1024];
for (int i = 0 ; i <4*1024 ; i++) {
fourKB[i]=127;
}
byte[] twoKB = new byte[2*1024];
for (int i = 0 ; i <2*1024 ; i++) {
twoKB[i]=127;
}
assertFalse(cache.put("four", fourKB));
assertTrue(cache.put("two", twoKB));
assertNull(cache.get("four"));
assertNotNull(cache.get("two"));
}
}
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